Shopify
How Many Shopify Apps Is Too Many? I Measured It
Everyone says apps slow your store down. Almost nobody says by how much. Here are measurements from real stores and a method for auditing your own.
Latest
Shopify
Shopify App Proxy Returns 404 and the Reason Is Never Obvious
The proxy path, the subpath prefix, and the actual route all have to line up. Here is the checklist and how to verify the signature properly.
PostgreSQL
Postgres deadlock detected: Fix the Lock Order
Two transactions each hold what the other wants. Here is how to read the deadlock report, find both statements, and restructure so it cannot happen again.
Docker
exec format error: The ARM64 and AMD64 Mismatch Explained
Your image builds on a Mac and dies in production. What the error means, how to check an image's architecture, and how to build multi arch properly.
Engineering Culture
Most Postmortems Are Theatre and Here Is What Makes One Useful
A document nobody reads, listing action items nobody does, produced to satisfy a process. Here is the version that actually changes something.
Shopify
Hydrogen or Liquid: Which Should Your Shopify Store Run On
Headless Shopify is genuinely better for some stores and a costly mistake for most. Here is how to tell which one you are.
Debugging
The Abstraction That Made Debugging Take All Day
Every layer you add to avoid repetition adds a place where the truth can hide. Here is how to tell which abstractions earn their cost.
DevOps
What to Do in the First Ten Minutes of an Incident
The instinct is to start investigating. The first ten minutes are better spent on four other things, and doing them makes the investigation faster.
Debugging
Print Debugging Is Underrated and I Will Defend It
Using a debugger is supposedly the mark of a serious engineer. Print statements are supposedly what beginners do. Both of those claims are wrong.
Next.js
Next.js Dynamic Server Usage: The Static-Dynamic Boundary
Your build fails because a page tried to read a header. Here is what triggers dynamic rendering and how to decide what each route should be.
AI
Why AI Generated Code Passes Tests and Still Breaks Production
Green CI, clean review, broken production. The gap is that tests check whether code matches the implementation and production checks whether it matches reality.
AI
The Six Bugs AI Coding Agents Write Most Often
After reviewing a lot of agent generated pull requests, the same six failure patterns keep appearing. They share a structure: locally plausible, globally wrong.